1,720,970 research outputs found
Urology in the time of corona
No full textThe world is currently in the grip of the COVID-19 pandemic. Rapid changes in medical priorities are being enforced across all health-care systems. Urologists have had to reduce or halt their clinical activity and assist on COVID-19 wards. The repercussions on urological patient outcomes for delayed treatments and diagnosis remain to be defined
Recurrent retroperitoneal solitary fibrous tumor: a case report
No full textBackground: Solitary fibrous tumor (SFT) is a rare mesenchymal neoplasm described initially in visceral pleura but can occasionally involve other sites such as the urinary tract. Extrapleural localizations are often indolent but some malignant SFTs have been described. The treatment and the most important prognostic factor for SFT seem to be complete resection of the neoplasm. Case report: We report the 10-year history of a retroperitoneal SFT, which recurred twice after conservative management, and was eventually treated with en bloc resection of the mass, the bladder, and the prostate, and urinary diversion by ileal conduit. To our knowledge, this case has the longest follow-up in the literature. Conclusion: Extrapleural SFTs often have indolent but unpredictable behavior as they can recur even after many years. Some histologic features are associated with the malignancy of these tumors. Complete resection of the neoplasm is the most important prognostic factor. Patients with SFT should be considered for a very long follow-up after the surgery due to the risk of possible late recurrences
A Snapshot from the Department of Urology in Bergamo Evaluating the Timeline of the SARS-CoV-2 Outbreak: Which Patients Are We Missing?
No full textThe province of Bergamo in Italy and in particular Papa Giovanni XXIII Hospital was one of the first areas to be hit by the SARS-CoV-2 outbreak and experience firsthand all the different phases of the crisis. We describe the timeline of the changes in overall urological workload during the outbreak period from lockdown to the slow reopening of activities. We sought to compare the 2020 hospital scenario with normality in the same period in 2019, highlighting the rationale behind decision-making when guidelines were not yet available. While we focus on the changes in surgical volumes for both elective (oncological and noncancer) and urgent cases, we have still to confront the risk of untreated and underdiagnosed patients. Patient summary: We present a snapshot of changes in urology during the peak of the COVID-19 outbreak in our hospital in Bergamo, Italy. The effect of medical lockdown on outcomes for untreated or underdiagnosed patients is still unknown. A noteworthy reduction in routine clinical and surgical urology practice has been experienced during the SARS-CoV-2 outbreak. The effect of medical lockdown on outcomes for untreated or underdiagnosed patients is still unknown
Extended pelvic lymph node dissection during radical prostatectomy: Comparison between initial robotic experience of a high-volume open surgeon and his contemporary open series
No full textBackground: The Aim of This Study Was to Evaluate Intra- and Perioperative Outcomes of a Single High Volume Open Radical Prostatectomy (Orp) Surgeon, During His Learning Curve Period for Robot-Assisted Radical Prostatectomy (Rarp) and Extended Pelvic Lymph Node Dissection (Eplnd). Methods: The Study Included 264 Intermediate-High Risk Prostate Cancer Patients, Treated By Orp + Eplnd or Rarp + Eplnd, Prospectively Collected. Descriptive Statistics Compared Clinical and Pathological Variables Between Groups. Bivariate (Pearson) Correlation Analysis Assessed The Relationship Between The Number of Lymph Node (Ln) Removed, Positive Surgical Margins (Psm), Surgical Time and The Number of Procedures Performed Per Group. Results: Pt Stage and Gleason Score (Gs) Were Lower In Rarp Than In Orp Group (Both P=0.04), While Psm Were More Frequent In The Rarp Group (40% Vs. 25%; P=0.02). However, Psm Decreased With The Increase of Rarp ProCedures. The Number of Lns Removed Was 25 and 22, In Rarp and Orp Group (P=0.03). However, Ln+ Rate Did Not Differ Between Groups (11% Vs. 16%; P=0.216). In The Rarp Group, Overall Surgical Time and Eplnd Time Decreased With The Increase of Surgical Procedures (All P<0.001). Conclusions: Rarp Requires Significant Learning Curve to Reduce Operative Room Time and Obtain Psm CompaRable to Those of An Orp High-Volume Surgeon. On The Contrary, The Quality of Eplnd During Rarp Seems to Be Not Related to The Number of Procedures Performed, Allowing Removal of a Number of Lns That Is Clinically Comparable to Orp
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
The impact of histological variants on outcomes after open radical cystectomy for muscle-invasive urothelial bladder cancer: results from a single tertiary referral centre
No full textObjectives To evaluate the impact of histological variants on oncological outcomes of patients with muscle-invasive bladder cancer treated with open radical cystectomy and furthermore to determine any association between survival and each histotype of bladder cancer. Materials and methods Data from 525 consecutive patients with muscle-invasive bladder cancer treated with radical cystectomy between January 2008 and May 2019 were collected retrospectively. The Kaplan–Meier curves and multivariable analysis addressed the role of histological variants in recurrence, cancer-specific and overall mortality between all subgroups. Results Of 525 patients, 131 (25.0%) showed a histological variant at radical cystectomy. With a median follow-up of 31 months, 209 (39.8%) recurrences, 184 (35.0%) cancer-related deaths and 260 (49.5%) overall deaths were reported. The presence of histological variant was associated with advanced tumour stage, the presence of concomitant carcinoma in situ, lymph node metastasis, lymphovascular invasion and positive surgical margins compared to pure urothelial bladder cancer (all p values < .008) and resulted as an independent risk factor for cancer-specific mortality (p = 0.001). Patients with a histological variant were at significantly higher risk for recurrence, cancer-specific mortality and overall mortality (all p values ≤ .001). Micropapillary, sarcomatoid or small cell differentiation was associated with reduced survival. Conclusion The presence of histological variants at radical cystectomy seems to be weakly associated with reduced survival compared to pure urothelial bladder cancer paired for pathologic stage. The association of histological variants with advanced and biologically aggressive tumours suggests the need for attention on the overall management of these patients, in particular for micropapillary, sarcomatoid and small cell differentiation
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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